KH Birth By Sleep Final Mix (PS4) - Monstro (LV1 Critical/Ventus) *No Damage*
1So... In case you couldn't figure it out, this was the reason I chose to not use Zero EXP during the main story... I am not overleveled or anything, that is legitimately how powerful Zero EXP is in the HD version of this game.
First phase, just use Magnet and Thunder and make sure you do not have a Finisher command when the phase ends, you want your basic attack available for the second phase.
When the second phase begins, rush to the left and hit the bombs at him. If you can get 2 clean hits on him, he should be stunned where he has his tongue out. Now the trick here is to cast Magnega before the Mines. Magnet has this bizarre effect where it seems to make each mine hit him multiple times. When done correctly, each Mine Square rips through nearly 3 bars of health which means after 3 casts he is dead.
Also, this is the absolute fastest way to farm Medals in the Mirage Arena.